From: Christoph Hellwig <hch@infradead.org>
To: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: "Darrick J. Wong" <djwong@us.ibm.com>,
Theodore Tso <tytso@mit.edu>, Jan Kara <jack@suse.cz>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Jens Axboe <axboe@kernel.dk>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Jeff Layton <jlayton@redhat.com>,
Dave Chinner <david@fromorbit.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Dave Hansen <dave@linux.vnet.ibm.com>,
Christoph Hellwig <hch@infradead.org>,
linux-mm@kvack.org, Chris Mason <chris.mason@oracle.com>,
Joel Becker <jlbec@evilplan.org>,
linux-scsi <linux-scsi@vger.kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
linux-ext4@vger.kernel.org, Mingming Cao <mcao@us.ibm.com>
Subject: Re: [PATCHSET v3.1 0/7] data integrity: Stabilize pages during writeback for various fses
Date: Tue, 10 May 2011 09:36:03 -0400 [thread overview]
Message-ID: <20110510133603.GA5823@infradead.org> (raw)
In-Reply-To: <87tyd31fkc.fsf@devron.myhome.or.jp>
On Tue, May 10, 2011 at 10:59:15AM +0900, OGAWA Hirofumi wrote:
> I'd like to know those patches are on what state. Waiting in writeback
> page makes slower, like you mentioned it (I guess it would more
> noticeable if device was slower that like FAT uses). And I think
> currently it doesn't help anything others for blk-integrity stuff
> (without other technic, it doesn't help FS consistency)?
It only makes things slower if we rewrite a region in a file that
is currently undergoing writeback. I'd be interested to know about
real life applications doing that, and if they really are badly affect
we should help them to work around that in userspace, e.g. by adding
a fadvice will rewrite call that might be used to never write back
that regions without an explicit fsync call.
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next prev parent reply other threads:[~2011-05-10 13:36 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-09 23:03 [PATCHSET v3.1 0/7] data integrity: Stabilize pages during writeback for various fses Darrick J. Wong
2011-05-09 23:03 ` [PATCH 1/7] mm: Wait for writeback when grabbing pages to begin a write Darrick J. Wong
2011-05-09 23:03 ` [PATCH 2/7] fs: block_page_mkwrite should wait for writeback to finish Darrick J. Wong
2011-05-10 12:41 ` Jan Kara
2011-05-10 17:12 ` Darrick J. Wong
2011-05-09 23:03 ` [PATCH 3/7] mm: Provide stub page_mkwrite functionality to stabilize pages during writes Darrick J. Wong
2011-05-09 23:03 ` [PATCH 4/7] ext4: Clean up some wait_on_page_writeback calls Darrick J. Wong
2011-05-18 18:16 ` [4/7] " Ted Ts'o
2011-05-09 23:03 ` [PATCH 5/7] ext4: Wait for writeback to complete while making pages writable Darrick J. Wong
2011-05-18 18:17 ` [5/7] " Ted Ts'o
2011-05-09 23:04 ` [PATCH 6/7] ext2: Lock buffer_head during metadata update Darrick J. Wong
2011-05-09 23:04 ` [PATCH 7/7] fat: Lock buffer_head during metadata updates Darrick J. Wong
2011-05-10 0:06 ` [PATCHSET v3.1 0/7] data integrity: Stabilize pages during writeback for various fses Dave Chinner
2011-05-10 1:59 ` OGAWA Hirofumi
2011-05-10 12:38 ` Jan Kara
2011-05-10 13:12 ` OGAWA Hirofumi
2011-05-10 13:29 ` Jan Kara
2011-05-10 13:46 ` OGAWA Hirofumi
2011-05-10 14:05 ` OGAWA Hirofumi
2011-05-10 14:54 ` Jan Kara
2011-05-10 16:12 ` OGAWA Hirofumi
2011-05-10 16:22 ` Jan Kara
2011-05-10 16:28 ` OGAWA Hirofumi
2011-05-16 18:47 ` Darrick J. Wong
2011-05-16 19:31 ` OGAWA Hirofumi
2011-05-17 1:23 ` Darrick J. Wong
2011-05-17 3:30 ` OGAWA Hirofumi
2011-10-23 16:38 ` Andy Lutomirski
2011-05-10 13:36 ` Christoph Hellwig [this message]
2011-05-10 13:52 ` OGAWA Hirofumi
2011-05-10 14:49 ` Jan Kara
2011-05-10 15:24 ` OGAWA Hirofumi
2011-05-10 16:18 ` Jan Kara
2011-05-10 16:29 ` OGAWA Hirofumi
2011-05-10 17:03 ` Jan Kara
2011-05-10 17:03 ` Christoph Hellwig
2011-05-10 20:50 ` OGAWA Hirofumi
2011-05-11 5:55 ` Christoph Hellwig
2011-05-11 9:36 ` OGAWA Hirofumi
2011-05-10 12:51 ` Jan Kara
2011-05-10 16:24 ` Chris Mason
2011-05-11 18:19 ` Darrick J. Wong
2011-05-12 9:42 ` Jan Kara
2011-05-16 18:49 ` Darrick J. Wong
2011-05-16 18:59 ` Jan Kara
2011-05-16 19:09 ` Darrick J. Wong
2011-05-16 19:04 ` Darrick J. Wong
2011-05-16 20:27 ` Christoph Hellwig
2011-05-16 20:55 ` Darrick J. Wong
2011-05-17 14:01 ` Christoph Hellwig
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